Change of the spectral power distribution of luminaires under various electrical conditions

In general spectroradiometric measurements are very important part of characterisation of photometric or colorimetric parameters of luminaires. Street luminaires are installed in the outdoor conditions and can be operated under various electrical conditions depending on quality of the electric power. Electrical parameters may not always be ideal. Some disturbances in the electricity grid can occur. These disturbances can negatively influence output even photometric or colorimetric parameters of these luminaires. Investigated parameter in both cases is spectrum of luminaire. In paper is investigated influence of simulated of various supplied electrical conditions on some type of street luminaires. Especially the most effort is focused on spectral changes of output luminaires supplied with artificially simulation by stabilized of power supply. Presented results discuss extent of effect on described parameters above.